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No Model.) 2 Sheets-Sheet 1.. Gf. H. TAYLOR. PURNAGB.

Patented Nov. 5, 1889.

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FIC. l.

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2 Sheets-Sheet 2.

(No Model.)

G.H.,TAYL0R.

FURNACE.

Patented Nov.

No. 4l4,604

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FIC-.6.

UNITED STATES PATENT EEicE.

GEORGE HENRY TAYLOR, OF LIVERPOOL, COUNTY OF LANCASTER, ENGLAND.

FURNACE.

SPECIFICATION forming part of4 Letters Patent No. 414,6()4, dated November 5, 1889.

Application tiled June 26, 1889. Serial No. 315,577. (No model.) Patented in England October 1'7, 1884, No. 13,733.

My invention relates to a novel construc-l tion of furnace for heating a steam-generator, by inea-ns of which the fuel is converted into gas in the central part of the fire-box or furnace and combustion takes place in a chamber formed between the inner furnace or gasproducer and outer casing of the same, as hereinafter fully described.

In commencing operations,a fire is lighted y on the lire-grate in the ordinary way, and is increased as quickly as practicable to a thick The gas which is then produced passes through conduitsto the lower part of' the combustion-chamber layer of incandescent fuel.

which surrounds the gas-producer. According to one arrangement the gas passes into conduits formed in the fire-brick lining of. the producer and is thence conducted tothe lower part of the combustion-chamber, where each conduit supplies two jets of gas. arrangement the whole of the interior or producer portion of the tire-box is made of firebrick or other fire-resisting material built up in sectional parts and domed over, or the gas may be led oit from the gas-producer or inner furnace by a central uptake to the outer or combustion chamber, the lower part of said central uptake being secured to an annular water-casing and the remaining length thereof being in the water-space above the bottom tube-plate. From the upper end of said uptake the gas is conveyed 'by branch pipes, preferably, to the outside of the steamgenerator shell, and thence by other pipes down to the combustion-chamber. The gas is ignited at the various ports or jets in the lower part of the combustion-chamber, the air, heated or otherwise, necessary to support Vcombustion being admitted close to each gasinlet. The products of combustion rise and pass through tubes in the upper portion of the steam-generator, the heated gases being led off to a chimney.

In this `of same igure; and Fig.

The gas-producer may be worked under pressure by any suitable steam-jet blower. The admission of air to the combustionchamber is regulated by valves and maybe assisted by the blast from the steam-j et blower taken from under the iiregrate. Openings are formed in the casing of the iire-box for iiring-doors', and in the fire-box foundation 6o plating for clinkering-doors, which doors rep y quire to be well iitted, so as to be air-tight when closed.

Dust-boxes are formed at the top of the steam-generator, and doors are provided for 6L; cleaning out thedust. The chimney isprovided with the necessary damper arrangement. The gas-conduits on the outside of the steam-generator are coated with a suitable composition to prevent radiation of heat, and 7c suitable cleaning-doors are provided at the elbows or bends. The supply of gas is regulated by the steam-blower and chimney-draft,

a thick bed of fuel being always maintained in the producer.

In order that my invention maybe readily understood,I will now describe it, with reference to theldrawings.

Figure 1 is a vertical section taken through the firing-door of the brick-lined producer, 8o and Fig. 2 is a vertical section taken through two of the gas-conduits. Fig. 3 is a plan on the line a [i of Fig. l, and Fig. e is a plan on the line o 0 of Fig. 2. Fig. 5 is a vertical section taken through the tiring-door of the S5 water-cased producer. Fig. 6 is a plan on line E F of Fig. 5; Fig. 7, a plan on line GH 8, a plan on line J K, also oi' same figure.

In apparatus constructed according to my 9o invention gas is produced in the central retort A, and is conveyed .by conduits a, to the inlets b in the lower part of the combustionchamber C, and air enters close to the gas-inlets at d, suitable cleaning-doors e being provided in the gas-conduits. The products of combustion pass upward and through the tubes T into the dust-box f. Thence the heat may be led into a chimney g, or by branch 7L- into an ordinary chimney.

The water-space k, Fig. 5, may have a firebrick lining Z set below it, and a fire-brick mouth-piece m for stoking through; or the water-space may be carried down to the lower IOO part of the ash-pit and there provided with suitable doors to facilitate cleaning. The lower part of the combustion-chamber is lined with fire-,bricks n. The central or inner lining o and gas-conduits of producer indicated on Sheet l are entirely of fire-resisting ymaterial.

The fire-box may stand upon a cast-iron bed-plate p, which forms the hearth of the gas-producer, and is provided With a plate or plates at the bottom; or the outer casing of the fire-'box may be continued down to the bottom or floor-level. l

s are the tire-bars, which are supported by bearers t. The clinker-doors u have suitable crosslbars and fixing-screws. The steam-jet blower c may be fixed where shown or in any other. convenient place. 1 .A close-fitting firing-door is provided in the casing at the front end of the mouth-piece m. Y The hopper and valve W (shown at Fig. 5) may be used as an alternate method for feeding the fuel through the uptake w, but still retaining the mouth-piece m. Water from the fire-box casing to the producer-casing 7c circulates through a number of tubes y, which are fitted with caps y. The said tubesy may have perforations, as at e', through which the sediment in t-he water-casings is lwashed out.

The water-casing lo of the gas-producer A (shown at Fig. 5) may be made a few inches less in depth, and the brick lining Z below said casing may be increased in depth, so as to coincide with the depth of fuel, leaving a space of a few inches between the lower edge ot' the water-casing and the upper edge of brick lining, and thereby forming an annular outlet for the gas to escape into the surrounding combustion-chamber, where jets of air are admitted to support combustion, as previously described.

The outer casing of the lire-box is oi greater diameter in circular or greater width in rectangular forms than the casing of the steamgenerator above or beyond the fire-box, whereby I provide for a large and sufcient gratesurface, and so insure an abundantsupply of gas, whether for vertical or for horizont-al generators, and whether for circular or for rectangular forms of producers and hre-boxes.

The drawings herein given illustrative of my invention have reference to verticalgenerators; but it is obvious that boilersof this type may be constructed in horizontal form, and that the gas-producer and combustionchamber may be also made of rectangular form when applied to existing horizontal tubulous boilers. The stoking-hole m and clinkerdoors n may be placed at any convenient angle from center line of generators tosuit position of coal-bunkers.

' In starting the producer, the smoke may be allowed to pass through the uptake w, the valve WV being opened, or through the gasconduits a until the iire is ready for making gas. The upper plate of dust-boxf has holes through which a flue-brush may be passed to clean the tubes T.

'In working these generators at high pressure, Where superheating of the steam is undesirable, the up'per heat-box of the generators may be lowered, so as to be covered with Water, the upper end of the' outer casing being domed for steam-space above said heatboX. ln the arrangement just named the heated gases may be passed into a chimney in the center of the dome, the details of which are well understood by boiler-makers.

Having now described my invention, whatI claim, and desire to secure by Letters Patent, 1s-

A steam-generating furnace-structure, consisting of a central gas-producing fire-box, an annular combustion-chamber encircling and entirely surrounding the fire-box and in communication with the external atmosphere, and gas-conducting passages extending from the top portion of the gas-producing fire-box and descending or leading downward and opening laterally into the combustion-chamber, whereby the produced gases are ignited in the combustion-chamber and ascend therefrom into the steam-generator, substantially as shown and described.

In witness whereof l have hereunto signed my name in the presence of two subscribing witnesses.

GEORGE HENRY TAYLOR.

VVitnessss:

J. PERoIvAL GAMOT, T. CREIGHTON, Clerks with Messrs. T/Vnse-g/ di' C0., Solfrs.,

2 Oooh- Street, Liverpool. 

